from __future__ import annotations

from datetime import date
from decimal import Decimal

from sqlalchemy import BigInteger, Date, ForeignKey, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column

from app.core.config import settings
from app.db.base import Base
from app.db.types import AuditMixin, IdMixin, Percent, qualified


class FundingRate(IdMixin, AuditMixin, Base):
    """Ставка фондирования портфеля в валюте, % годовых, с даты effective_from
    до следующей записи (D27)."""

    __tablename__ = "funding_rate"
    __table_args__ = (
        UniqueConstraint(
            "portfolio_id",
            "currency_id",
            "effective_from",
            name="uq_funding_rate_portfolio_currency_date",
        ),
        {"schema": settings.DATABASE_SCHEMA} if settings.DATABASE_SCHEMA else {},
    )

    portfolio_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey(qualified("portfolio.id")), nullable=False
    )
    currency_id: Mapped[int] = mapped_column(
        BigInteger, ForeignKey(qualified("currency.id")), nullable=False
    )
    effective_from: Mapped[date] = mapped_column(Date, nullable=False)
    rate: Mapped[Decimal] = mapped_column(Percent, nullable=False)